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Watch Demi Lovato Get Serenaded by the Cast of 'The Walking Dead'

The performer certainly got her birthday wish.

Demi Lovato got a zombie-riffic birthday surprise from castmembers of her favorite show, The Walking Dead.

The AMC drama's Andrew Lincoln (Rick Grimes) and Norman Reedus (Daryl Dixon) sang the pop star "Happy Birthday" in a special recorded video for her 24th birthday on Saturday. Lovato shared the clip, which featured Reedus wearing a plastic lion mask, on Snapchat Friday evening.

The singer was beyond excited by the special birthday serenade. “I just got the best birthday video sent from the cast of the walking dead and I’m shitting my pants,” she wrote on Twitter.